The two men already in custody for the Christmas Day plot will be charged over the fire along with Hatim Moukhaiber, a 29-year-old Meadow Heights man arrested when his car was stopped in Roxburgh Park on Saturday night.

The three men will be charged with engaging in a terrorist act, police said.

“It is clear that these arson attacks were designed to intimidate and influence those that attend this mosque and the wider Islamic community. These actions have no place in our society,” Assistant Commissioner Ian McCartney said in the statement.

“Victoria Police is proud to serve a diverse multi-faith and multicultural community, and will not tolerate this kind of behaviour in our community," Victoria Police Counter Terrorism Command Assistant Commissioner Ross Guenther said.

The men will be charged today, and face a maximum penalty of life imprisonment for these offences, police said.